Former Naval Fuel Depot Point Molate December 8, 2014 Summary of IR Site 3 Remediation and Abatement Work to Date Point Molate Naval Fuel Depot Richmond, California

Process Notice to Proceed on August 8 th Construction Workplan approval August 28 th LBP and Asbestos Abatement – ~9/8 through ~9/19 Building Demolition – ~9/17 through ~10/7 Initial SWPPP installation – ~9/9 through ~9/16

0-5 feet removal Started removal on 9/23 – Excavation A (~9/23 through ~10/9) – Excavation B (~9/25 through ~10/17) – Excavation C Panhandle (~10/1 through ~10/17) – Excavation D (~9/23 through ~9/24) – Excavation E (~9/23 through ~10/6) – Excavation F (~10/3 through ~10/22) – Excavation G (~9/24 through ~10/15 – Excavation H (~10/8 through ~10/10 Work is complete except around Excavation C

5-10+ feet removal Started removal on 9/23 – Excavation I (~10/15 through ~11/18) – Excavation J (~11/5 through ~11/18) – Excavation K (not started H&S) – Excavation L (~11/5 – ongoing step-out – H&S) – Excavation M (~10/21 through ~10/22) Excavated to full depth (17 feet bgs – except M is only 10 feet)

Overburden Removal of soil over 5 to 10 foot excavation areas and stockpile Removal of soil over 10+ foot excavation adjacent to building 6 ~3000 cy

Hazardous Waste RCRA waste under bid total (bid = 504 tons; actual 335 tons) Non RCRA hazardous waste (bid = 3693 tons; actual ~5000 tons) Many step-outs to try to reduce tonnage Approximately 500 tons left

Import Soil Approximately 30,000 tons of import From Cathedral Hill in San Francisco Tested for wide variety of potential contaminants and its very clean Stockpiled on Drum Lot 1

Air Monitoring Monitored at upwind and downwind locations All daily averages below action limit of 0.05 mg/l Exceptions on foggy and pollution days as follows: – 11/6/2014 (hazy with no visible dust at site) – 11/10/2014 (foggy) – 11/25/2014 (hazy with no soil movement) Preparing a reduction in effort here

Stormwater Lots of RainActual (in)Average (in) September October November December 4.03 (through 12/8) 4.36 Lots of Rain –shut down since Thanksgiving 4.8 inch in last two weeks Forecast is not good for this week (4.6 inches predicted this week) Likely shutdown until new years with this much rain 2x average in December in first two weeks

RWQCB NOV for Stormwater November 19, 2014

BMP Corrections on November 20 Zero outflow from pipe

BMP Corrections on November 20 Drop inlet not connected to system but sealed in any case

Further Upgrades on November 21

Upgraded and Performance

Issues to date Additional Hazardous Waste (likely increase in cost of ~$175k) Additional Class II material 10% increase with step- outs (~$100k to date) Saved ~$50k on RCRA Haz Weather Delay – Debating whether it makes sense to come back in January or mothball the site until March or April – Cost implication to winterizing and running PGWTP

Questions

IR Site 3 Progress to date (11/30/2015) RCRA Hazardous – 335 tons of 335 tons – complete Non-RCRA Cal-Haz – 4,700 tons out of apprx. 5,100 tons Class II - Approximately 40,000 tons out of estimated 150,000 tons Import Soil – apprx 32,000 tons out of apprx. 135,000 tons Overburden – 5,000 cy out of apprx. 90,000 cy